Bluetooth: Audio: Volume Control Service and client
This commit implements the volume control service (VCS) and client, The implementation supports and uses the Audio Input Control Service (AICS) and Volume Offset Control Service (VOCS) secondary services. Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>
This commit is contained in:
Emil Gydesen
Carles Cufí
parent
a9e900dbfd
commit
82a32f5ca5
14 changed files with 4528 additions and 2 deletions
519
include/bluetooth/audio/vcs.h
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519
include/bluetooth/audio/vcs.h
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/*
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* Copyright (c) 2020-2021 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_INCLUDE_BLUETOOTH_SERVICES_VCS_H_
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#define ZEPHYR_INCLUDE_BLUETOOTH_SERVICES_VCS_H_
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/**
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* @brief Volume Control Service (VCS)
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*
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* @defgroup bt_gatt_vcs Volume Control Service (VCS)
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*
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* @ingroup bluetooth
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* @{
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*
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* [Experimental] Users should note that the APIs can change
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* as a part of ongoing development.
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*/
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#include <zephyr/types.h>
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#include <bluetooth/audio/aics.h>
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#include <bluetooth/audio/vocs.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(CONFIG_BT_VCS)
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#define BT_VCS_VOCS_CNT CONFIG_BT_VCS_VOCS_INSTANCE_COUNT
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#define BT_VCS_AICS_CNT CONFIG_BT_VCS_AICS_INSTANCE_COUNT
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#else
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#define BT_VCS_VOCS_CNT 0
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#define BT_VCS_AICS_CNT 0
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#endif /* CONFIG_BT_VCS */
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/** Volume Control Service Error codes */
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#define BT_VCS_ERR_INVALID_COUNTER 0x80
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#define BT_VCS_ERR_OP_NOT_SUPPORTED 0x81
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/** Register structure for Volume Control Service */
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struct bt_vcs_register_param {
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/** Register parameters for Volume Offset Control Services */
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struct bt_vocs_register_param vocs_param[BT_VCS_VOCS_CNT];
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/** Register parameters for Audio Input Control Services */
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struct bt_aics_register_param aics_param[BT_VCS_AICS_CNT];
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/** Volume Control Service callback structure. */
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struct bt_vcs_cb *cb;
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};
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/**
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* @brief Volume Control Service service instance
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*
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* Used for to represent a Volume Control Service instance, for either a client
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* or a server. The instance pointers either represent local server instances,
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* or remote service instances.
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*/
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struct bt_vcs {
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/** Number of Volume Offset Control Service instances */
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uint8_t vocs_cnt;
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/** Array of pointers to Volume Offset Control Service instances */
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struct bt_vocs **vocs;
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/** Number of Audio Input Control Service instances */
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uint8_t aics_cnt;
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/** Array of pointers to Audio Input Control Service instances */
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struct bt_aics **aics;
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};
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/**
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* @brief Register the Volume Control Service.
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*
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* This will register and enable the service and make it discoverable by
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* clients.
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*
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* @param param Volume Control Service register parameters.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_register(struct bt_vcs_register_param *param);
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/**
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* @brief Get Volume Control Service service pointer.
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*
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* Returns a pointer to a struct that contains information about the
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* Volume Control Service instance, such as pointers to the
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* Volume Offset Control Service (Volume Offset Control Service) or
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* Audio Input Control Service (AICS) instances.
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*
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* @param conn Connection to peer device, or NULL to get server value.
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* @param[out] service Pointer to store the result in.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_get(struct bt_conn *conn, struct bt_vcs *service);
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/**
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* @brief Callback function for bt_vcs_discover.
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*
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* This callback is only used for the client.
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*
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* @param conn The connection that was used to discover
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* Volume Control Service.
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* @param err Error value. 0 on success, GATT error on positive value
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* or errno on negative value.
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* @param vocs_count Number of Volume Offset Control Service instances
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* on peer device.
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* @param aics_count Number of Audio Input Control Service instances on
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* peer device.
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*/
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typedef void (*bt_vcs_discover_cb)(struct bt_conn *conn, int err,
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uint8_t vocs_count, uint8_t aics_count);
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/**
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* @brief Callback function for Volume Control Service volume state.
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*
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* Called when the value is locally read as the server.
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* Called when the value is remotely read as the client.
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* Called if the value is changed by either the server or client.
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*
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* @param conn NULL if local server read or write, otherwise the connection
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* to the peer device if remotely read or written.
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* @param err Error value. 0 on success, GATT error on positive value
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* or errno on negative value.
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* @param volume The volume of the Volume Control Service server.
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* @param mute The mute setting of the Volume Control Service server.
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*/
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typedef void (*bt_vcs_state_cb)(struct bt_conn *conn, int err, uint8_t volume,
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uint8_t mute);
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/**
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* @brief Callback function for Volume Control Service flags.
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*
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* Called when the value is locally read as the server.
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* Called when the value is remotely read as the client.
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* Called if the value is changed by either the server or client.
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*
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* @param conn NULL if local server read or write, otherwise the connection
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* to the peer device if remotely read or written.
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* @param err Error value. 0 on success, GATT error on positive value
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* or errno on negative value.
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* @param flags The flags of the Volume Control Service server.
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*/
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typedef void (*bt_vcs_flags_cb)(struct bt_conn *conn, int err, uint8_t flags);
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/**
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* @brief Callback function for writes.
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*
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* This callback is only used for the client.
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*
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* @param conn NULL if local server read or write, otherwise the connection
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* to the peer device if remotely read or written.
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* @param err Error value. 0 on success, GATT error on fail.
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*/
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typedef void (*bt_vcs_write_cb)(struct bt_conn *conn, int err);
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struct bt_vcs_cb {
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/* Volume Control Service */
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bt_vcs_state_cb state;
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bt_vcs_flags_cb flags;
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#if defined(CONFIG_BT_VCS_CLIENT)
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bt_vcs_discover_cb discover;
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bt_vcs_write_cb vol_down;
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bt_vcs_write_cb vol_up;
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bt_vcs_write_cb mute;
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bt_vcs_write_cb unmute;
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bt_vcs_write_cb vol_down_unmute;
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bt_vcs_write_cb vol_up_unmute;
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bt_vcs_write_cb vol_set;
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/* Volume Offset Control Service */
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struct bt_vocs_cb vocs_cb;
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/* Audio Input Control Service */
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struct bt_aics_cb aics_cb;
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#endif /* CONFIG_BT_VCS_CLIENT */
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};
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/**
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* @brief Discover Volume Control Service and included services.
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*
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* This will start a GATT discovery and setup handles and subscriptions.
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* This shall be called once before any other actions can be
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* executed for the peer device.
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*
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* This shall only be done as the client,
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*
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* @param conn The connection to discover Volume Control Service for.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_discover(struct bt_conn *conn);
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/**
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* @brief Set the Volume Control Service volume step size.
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*
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* Set the value that the volume changes, when changed relatively with e.g.
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* @ref bt_vcs_vol_down or @ref bt_vcs_vol_up.
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*
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* This can only be done as the server.
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*
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* @param volume_step The volume step size (1-255).
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_vol_step_set(uint8_t volume_step);
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/**
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* @brief Read the Volume Control Service volume state.
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*
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* @param conn Connection to the peer device,
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* or NULL to read local server value.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_vol_get(struct bt_conn *conn);
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/**
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* @brief Read the Volume Control Service flags.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_flags_get(struct bt_conn *conn);
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/**
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* @brief Turn the volume down by one step on the server.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_vol_down(struct bt_conn *conn);
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/**
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* @brief Turn the volume up by one step on the server.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_vol_up(struct bt_conn *conn);
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/**
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* @brief Turn the volume down and unmute the server.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_unmute_vol_down(struct bt_conn *conn);
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/**
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* @brief Turn the volume up and unmute the server.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_unmute_vol_up(struct bt_conn *conn);
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/**
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* @brief Set the volume on the server
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*
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* @param conn Connection to peer device, or NULL to set local server value.
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* @param volume The absolute volume to set.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_vol_set(struct bt_conn *conn, uint8_t volume);
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/**
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* @brief Unmute the server.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_unmute(struct bt_conn *conn);
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/**
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* @brief Mute the server.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_mute(struct bt_conn *conn);
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/**
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* @brief Read the Volume Offset Control Service offset state.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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* @param inst Pointer to the Volume Offset Control Service instance.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_vocs_state_get(struct bt_conn *conn, struct bt_vocs *inst);
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/**
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* @brief Read the Volume Offset Control Service location.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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* @param inst Pointer to the Volume Offset Control Service instance.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_vocs_location_get(struct bt_conn *conn, struct bt_vocs *inst);
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/**
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* @brief Set the Volume Offset Control Service location.
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*
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* @param conn Connection to peer device, or NULL to set local server
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* value.
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* @param inst Pointer to the Volume Offset Control Service instance.
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* @param location The location to set.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_vocs_location_set(struct bt_conn *conn, struct bt_vocs *inst,
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uint8_t location);
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/**
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* @brief Set the Volume Offset Control Service offset state.
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*
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* @param conn Connection to peer device, or NULL to set local server value.
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* @param inst Pointer to the Volume Offset Control Service instance.
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* @param offset The offset to set (-255 to 255).
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_vocs_state_set(struct bt_conn *conn, struct bt_vocs *inst,
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int16_t offset);
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/**
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* @brief Read the Volume Offset Control Service output description.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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* @param inst Pointer to the Volume Offset Control Service instance.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_vocs_description_get(struct bt_conn *conn, struct bt_vocs *inst);
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/**
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* @brief Set the Volume Offset Control Service description.
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*
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* @param conn Connection to peer device, or NULL to set local server
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* value.
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* @param inst Pointer to the Volume Offset Control Service instance.
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* @param description The description to set.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_vocs_description_set(struct bt_conn *conn, struct bt_vocs *inst,
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const char *description);
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/**
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* @brief Deactivates an Audio Input Control Service instance.
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*
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* Audio Input Control Services are activated by default, but this will allow
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* the server to deactivate an Audio Input Control Service.
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*
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* @param inst Pointer to the Audio Input Control Service instance.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_aics_deactivate(struct bt_aics *inst);
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/**
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* @brief Activates an Audio Input Control Service instance.
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*
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* Audio Input Control Services are activated by default, but this will allow
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* the server to reactivate an Audio Input Control Service instance after it has
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* been deactivated with @ref bt_vcs_aics_deactivate.
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*
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* @param inst Pointer to the Audio Input Control Service instance.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_aics_activate(struct bt_aics *inst);
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/**
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* @brief Read the Audio Input Control Service input state.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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* @param inst Pointer to the Audio Input Control Service instance.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_aics_state_get(struct bt_conn *conn, struct bt_aics *inst);
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/**
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* @brief Read the Audio Input Control Service gain settings.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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* @param inst Pointer to the Audio Input Control Service instance.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_aics_gain_setting_get(struct bt_conn *conn, struct bt_aics *inst);
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/**
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* @brief Read the Audio Input Control Service input type.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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* @param inst Pointer to the Audio Input Control Service instance.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_aics_type_get(struct bt_conn *conn, struct bt_aics *inst);
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/**
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* @brief Read the Audio Input Control Service input status.
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*
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* @param conn Connection to peer device, or NULL to read local server value.
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* @param inst Pointer to the Audio Input Control Service instance.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_aics_status_get(struct bt_conn *conn, struct bt_aics *inst);
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/**
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* @brief Mute the Audio Input Control Service input.
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*
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* @param conn Connection to peer device, or NULL to set local server value.
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* @param inst Pointer to the Audio Input Control Service instance.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_aics_mute(struct bt_conn *conn, struct bt_aics *inst);
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/**
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* @brief Unmute the Audio Input Control Service input.
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*
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* @param conn Connection to peer device, or NULL to set local server value.
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* @param inst Pointer to the Audio Input Control Service instance.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_aics_unmute(struct bt_conn *conn, struct bt_aics *inst);
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/**
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* @brief Set input gain to manual.
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*
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* @param conn Connection to peer device, or NULL to set local server value.
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* @param inst Pointer to the Audio Input Control Service instance.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_aics_manual_gain_set(struct bt_conn *conn, struct bt_aics *inst);
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/**
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* @brief Set the input gain to automatic.
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*
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* @param conn Connection to peer device, or NULL to set local server value.
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* @param inst Pointer to the Audio Input Control Service instance.
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_aics_automatic_gain_set(struct bt_conn *conn, struct bt_aics *inst);
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/**
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* @brief Set the input gain.
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*
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* @param conn Connection to peer device, or NULL to set local server value.
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* @param inst Pointer to the Audio Input Control Service instance.
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* @param gain The gain in dB to set (-128 to 127).
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*
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* @return 0 if success, errno on failure.
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*/
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int bt_vcs_aics_gain_set(struct bt_conn *conn, struct bt_aics *inst,
|
||||
int8_t gain);
|
||||
|
||||
/**
|
||||
* @brief Read the Audio Input Control Service description.
|
||||
*
|
||||
* @param conn Connection to peer device, or NULL to read local server value.
|
||||
* @param inst Pointer to the Audio Input Control Service instance.
|
||||
*
|
||||
* @return 0 if success, errno on failure.
|
||||
*/
|
||||
int bt_vcs_aics_description_get(struct bt_conn *conn, struct bt_aics *inst);
|
||||
|
||||
/**
|
||||
* @brief Set the Audio Input Control Service description.
|
||||
*
|
||||
* @param conn Connection to peer device, or NULL to set local server
|
||||
* value.
|
||||
* @param inst Pointer to the Audio Input Control Service instance.
|
||||
* @param description The description to set.
|
||||
*
|
||||
* @return 0 if success, errno on failure.
|
||||
*/
|
||||
int bt_vcs_aics_description_set(struct bt_conn *conn, struct bt_aics *inst,
|
||||
const char *description);
|
||||
|
||||
/**
|
||||
* @brief Registers the callbacks used by the Volume Control Service client.
|
||||
*
|
||||
* @param cb The callback structure.
|
||||
*
|
||||
* @return 0 if success, errno on failure.
|
||||
*/
|
||||
int bt_vcs_client_cb_register(struct bt_vcs_cb *cb);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
/**
|
||||
* @}
|
||||
*/
|
||||
|
||||
#endif /* ZEPHYR_INCLUDE_BLUETOOTH_SERVICES_VCS_H_ */
|
||||
|
|
@ -167,8 +167,9 @@ typedef void (*bt_vocs_description_cb_t)(struct bt_conn *conn, struct bt_vocs *i
|
|||
/**
|
||||
* @brief Callback function for bt_vocs_discover.
|
||||
*
|
||||
* This callback will usually be overwritten by the primary service that
|
||||
* includes the Volume Control Offset Service client.
|
||||
* This callback should be overwritten by the primary service that
|
||||
* includes the Volume Control Offset Service client, and should thus not be
|
||||
* set by the application.
|
||||
*
|
||||
* @param conn Connection to peer device, or NULL if local server read.
|
||||
* @param inst The instance pointer.
|
||||
|
|
|
|||
|
|
@ -419,6 +419,15 @@ struct bt_uuid_128 {
|
|||
*/
|
||||
#define BT_UUID_AICS \
|
||||
BT_UUID_DECLARE_16(BT_UUID_AICS_VAL)
|
||||
/** @def BT_UUID_VCS_VAL
|
||||
* @brief Volume Control Service value
|
||||
*/
|
||||
#define BT_UUID_VCS_VAL 0x1844
|
||||
/** @def BT_UUID_VCS
|
||||
* @brief Volume Control Service
|
||||
*/
|
||||
#define BT_UUID_VCS \
|
||||
BT_UUID_DECLARE_16(BT_UUID_VCS_VAL)
|
||||
/** @def BT_UUID_VOCS_VAL
|
||||
* @brief Volume Offset Control Service value
|
||||
*/
|
||||
|
|
@ -1376,6 +1385,33 @@ struct bt_uuid_128 {
|
|||
*/
|
||||
#define BT_UUID_AICS_DESCRIPTION \
|
||||
BT_UUID_DECLARE_16(BT_UUID_AICS_DESCRIPTION_VAL)
|
||||
/** @def BT_UUID_VCS_STATE_VAL
|
||||
* @brief Volume Control Setting value
|
||||
*/
|
||||
#define BT_UUID_VCS_STATE_VAL 0x2B7D
|
||||
/** @def BT_UUID_VCS_STATE
|
||||
* @brief Volume Control Setting
|
||||
*/
|
||||
#define BT_UUID_VCS_STATE \
|
||||
BT_UUID_DECLARE_16(BT_UUID_VCS_STATE_VAL)
|
||||
/** @def BT_UUID_VCS_CONTROL_VAL
|
||||
* @brief Volume Control Control point value
|
||||
*/
|
||||
#define BT_UUID_VCS_CONTROL_VAL 0x2B7E
|
||||
/** @def BT_UUID_VCS_CONTROL
|
||||
* @brief Volume Control Control point
|
||||
*/
|
||||
#define BT_UUID_VCS_CONTROL \
|
||||
BT_UUID_DECLARE_16(BT_UUID_VCS_CONTROL_VAL)
|
||||
/** @def BT_UUID_VCS_FLAGS_VAL
|
||||
* @brief Volume Control Flags value
|
||||
*/
|
||||
#define BT_UUID_VCS_FLAGS_VAL 0x2B7F
|
||||
/** @def BT_UUID_VCS_FLAGS
|
||||
* @brief Volume Control Flags
|
||||
*/
|
||||
#define BT_UUID_VCS_FLAGS \
|
||||
BT_UUID_DECLARE_16(BT_UUID_VCS_FLAGS_VAL)
|
||||
/** @def BT_UUID_VOCS_STATE_VAL
|
||||
* @brief Volume Offset State value
|
||||
*/
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue